It’s safe to assume that The Real Housewives of Beverly Hills’ starsKyle Richards and Brandi Glanvillewon’t make up anytime soon. After Glanville caused a massive blowup between Kyle and her sister Kim Richards during Eileen Davidson’s poker night, Kyle tells Us Weekly exclusively that she’s never met someone as “vicious” as Glanville.

“I honestly have never met someone like Brandi in my life,” Kyle told Us at her store Kyle by Alene Too in Beverly Hills of the startling incident, which played out on the Jan. 20 and Jan. 27 episodes. “She has no regard for your children, your family, your marriage, your businesses; when she decides to go after you she is vicious and relentless.”

In case you missed it, during newcomer Davidson’s poker night at her Malibu, Calif. home, Glanville and Kyle got into a physical altercation after Glanville, 42, attempted to take a prescription-pill-addled Kim home while Kyle, in turn, was trying to confront her sister about her odd behavior.

“It’s shocking to see the way Brandi is trying to twist the events that clearly happened,” the mom of four added of Glanville, who claimed she was only trying to protect Kim from an overbearing Kyle. “I was very upset because whatever Brandi was trying to put into Kim's head seemed to be working…I asked her repeatedly to please leave us alone and go away but she was looking for a fight and creating a scene in front of the cameras.”

While Glanville has been friendly with former child star Kim since the beginning of season 5, she pushed her luck with Kyle last season, after alluding that her husband Mauricio Umansky had been unfaithful.

“Obviously I do not think Brandi would be the best person for my sister to be spending time with — for many reasons,” Kyle, 46, tells Us. “Brandi never wants to take responsibility for her actions…What about when she accused Kim of using meth in season two, something that was completely untrue? Those comments were made to hurt Kim and her reputation, and obviously affected her children as well…Or [what about] bringing up the lies in the tabloids on camera last season, what about my children?”

Although no seasons of RHOBH have been short on drama or alterations (physical and otherwise) Kyle says this season has been the most strenuous to shoot.